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Title: Modeling of beams and arches made from processed snow and subjected to static loads
Authors: United States. Defense Atomic Support Agency.
Watt, James M.
Keywords: Arches
Beams (supports)
Processed snow
Static loads
Issue Date: Jan-1969
Publisher: Weapons Effects Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; N-69-1.
Description: Technical report
Abstract: This report describes the modeling procedures- and results of static loading of structural elements made of processed snow. The experiments were performed at Camp Century, Greenland, during the summers of 1961 and 1962 by the U. S, Army Engineer Waterways Experiment Station (WES) and were sponsored by the Defense Atomic Support Agency. The general objective of this investigation was to study the response of processed-snow beams and arches to static loads, and to formulate criteria that will make it possible to design processed-snow structures to resist the airblast effects of nuclear explosions. The primary objective of the study reported herein was to determine the response and verify the adequacy of the modeling procedures for snow structures subjected to static loadings. Calibration of the loading devices is discussed in Appendix A. Data obtained from static tests of 507 beam, 256 arch, and 1,758 cylinder specimens are presented in tabular form in Appendix B. The arches and beams were of three sizes, i.e. a prototype {length ratio n of 1) having a span length of 9 feet, a model (n of 2.4) having a span length of 3.75 feet, and another model (n of 6) having a span length of 1.5 feet. The test cylinders were 3 inches in diameter by 6 inches long. Because of the many variables involved, the modeling procedures for structures made of snow were not verified. However, the response of beams, arches, and cylinders made of processed snow is described and ranges of pressure that cause collapse have been determined, i.e. 0.25 to 8 psi for the beams, 2 to 60 psi for the arches, and 2 to 69 psi for the cylinders. The most significant results are curves that relate the strength of processed snow to such parameters as temperature, age, specific weight, and loading rate.
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